HDPE (high-density polyethylene) filter brick for filter tank system

Abstract

An HDPE filter brick for a filter tank system comprises a filter brick body, the filter brick body comprises a top plate, two side plates, a bottom plate and two inclined plates, a water return groove is formed in the middle of the top plate, the two long edges of the top plate are connected with the upper edges of the two side plates respectively, and the lower edges of the two side plates are connected with the two long edges of the bottom plate respectively. The upper edges of the two inclined plates are respectively connected with the two bottom corners of the water return groove, and the lower edges of the two inclined plates are respectively connected with the two long edges of the bottom plate; a plurality of rib plates are arranged on the surface of the top plate at equal intervals and are parallel to the short edges of the top plate; the upper surface of the top plate is divided into a plurality of gas-water distribution units by rib plates and water return grooves, and gas-water distribution holes are formed in the four corners of each gas-water distribution unit and communicated with a cavity below the top plate. According to the utility model, the defects in the prior art are overcome, and the top plate can be stressed more uniformly through the air-water distribution holes in square distribution, so that the top plate of the filter brick is more difficult to be damaged by local high pressure generated by backwashing airflow and water flow.

Description

Technical Field

[0001] The utility model relates to the technical field of biological filters, and particularly relates to an HDPE filter brick for a filter system. Background Art

[0002] Water treatment processes are mainly divided into the activated sludge method and the biofilm method. Among them, the biological filters in the biofilm method are further divided into anaerobic biological filters, anoxic biological filters, and aeration biological filter sewage treatment processes. The biological filter method has the advantages of good water treatment quality, strong shock load resistance, small floor area, low operation cost, and simple maintenance and management compared with the activated sludge method. Among them, the denitrifying deep bed filter is a biological filter that combines biological nitrogen removal and filtration functions, and its method of filtering sewage is a commonly used and advanced sewage treatment process for upgrading and advanced treatment of sewage plants.

[0003] Backwashing is an indispensable step in the operation of the filter, and ensuring its backwashing effect is crucial for ensuring the stability of the filter operation. At the same time, the backwashing of the filter depends on a uniform air-water distribution system. Among the currently known air-water distribution methods, HDPE filter bricks have gradually been recognized by the market due to their low price, fast and convenient installation method, and relatively uniform distribution effect.

[0004] However, the currently known HDPE filter bricks still have various drawbacks, such as a low hole opening rate, insufficiently uniform air-water distribution, loose connection between filter bricks, which is likely to cause leakage, and local high pressure during backwashing, which may cause the filter bricks to tip over. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects of the above-mentioned existing technologies and provide an HDPE filter brick for a filter system.

[0006] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0007] An HDPE filter brick for a filter system includes a filter brick body. The filter brick body includes a top plate, two side plates, a bottom plate, and two inclined plates. A downwardly concave water return groove is provided in the middle of the top plate. The two long sides of the top plate are respectively connected to the upper sides of the two side plates. The lower sides of the two side plates are respectively connected to the two long sides of the bottom plate. The upper sides of the two inclined plates are respectively connected to the two bottom corners of the water return groove. The lower sides of the two inclined plates are respectively connected to the two long sides of the bottom plate. A plurality of rib plates are equidistantly arranged on the surface of the top plate, and the rib plates are arranged parallel to the short side of the top plate;

[0008] The upper surface of the top plate is divided into a plurality of air-water distribution units by the rib plates and the water return groove. Air-water distribution holes are provided at the four corner positions of each air-water distribution unit, and the air-water distribution holes are communicated with the cavity below the top plate.

[0009] Preferably, a spare air-water distribution hole is provided at the intersection of the diagonals of the air-water distribution unit, and the spare air-water distribution hole is communicated with the cavity below the top plate.

[0010] Preferably, each of the standby air-water distribution holes is symmetrically provided with "I"-shaped wing plates on both sides, and the wing plates are arranged parallel to the long sides of the top plate.

[0011] Preferably, a high-pressure relief safety hole is provided on the rib plate, and the high-pressure relief safety hole is communicated with the cavity below the top plate.

[0012] Preferably, the two short sides of the two inclined plates and the ends of the return water trough are respectively connected to form two end faces, and the two end faces are respectively provided with bosses and grooves, and the adjacent two HDPE filter bricks are docked through the bosses and grooves.

[0013] Preferably, sealant is applied between the boss and the groove.

[0014] The utility model provides a HDPE filter brick for a filter tank system. It has the following beneficial effects: the square-distributed air-water distribution holes can make the top plate more evenly stressed, and then make the top plate of the filter brick less likely to be damaged by the local high pressure generated by the airflow and water flow during backwashing. By setting up spare air-water distribution holes, the air-water distribution holes at the four corners and the spare air-water distribution holes at the center can serve as backup for each other, and the opening rate of the HDPE filter brick can be adjusted according to actual conditions, and opened when necessary to improve efficiency during filtration, while also improving backwashing efficiency. The provision of high-pressure relief safety holes can release pressure in time when there is local high pressure on the four sides of the filter brick, so that the HDPE filter brick is not easily affected by the local high pressure and overturned during backwashing. The bosses and grooves that fit into each other allow the ends of the inclined plates of the HDPE filter brick to be tightly connected after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for describing the prior art.

[0016] Figure 1 A schematic diagram of the front three-dimensional structure of the utility model;

[0017] Figure 2 A schematic diagram of the back three-dimensional structure of the utility model;

[0018] Figure 3 A top view of the utility model;

[0019] Figure 4 A schematic structural diagram of the gas-water distribution unit in the utility model;

[0020] Description of the numbers in the figure:

[0021] 1. Top plate; 2. Two side plates; 3. One bottom plate; 4. Two inclined plates; 5. Boss; 6. Groove; 7. Spare air-water distribution hole; 8. Wing plate; 9. Air-water distribution hole; 10. High-pressure relief safety hole; 11. Air-water distribution unit; 12. Rib plate; 13. Water return groove. Specific implementation manner

[0022] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model.

[0023] Example 1, as Figures 1-4 shown, an HDPE filter brick for a filter tank system includes a filter brick body. The filter brick body includes one top plate 1, two side plates 2, one bottom plate 3 and two inclined plates 4. A downwardly concave water return groove 13 is provided in the middle of the top plate 1. The two long sides of the top plate 1 are respectively connected to the upper sides of the two side plates 2. The lower sides of the two side plates 2 are respectively connected to the two long sides of the bottom plate 3. The upper sides of the two inclined plates 4 are respectively connected to the two bottom corners of the water return groove 13. The lower sides of the two inclined plates 4 are respectively connected to the two long sides of the bottom plate 3; A plurality of rib plates 12 are equidistantly arranged on the surface of the top plate 1. The rib plates 12 are arranged parallel to the short side of the top plate 1. A cavity is formed between the top plate 1, the water return groove 13, the two side plates 2 and the two inclined plates 4;

[0024] The upper surface of the top plate 1 is divided into a plurality of square air-water distribution units 11 by the rib plates 12 and the water return groove 13. Air-water distribution holes 9 are provided at the four corner positions of each air-water distribution unit 11. The air-water distribution holes 9 communicate with the cavity below the top plate 1.

[0025] Working principle:

[0026] In this embodiment, the upper surface of the top plate 1 is divided into a plurality of square air-water distribution units 11 by the rib plates 12 and the water return groove 13, and air-water distribution holes 9 are provided at the four corner positions of each air-water distribution unit 11. During normal filtration and backwashing, these air-water distribution holes 9 can serve as the passages for water and gas. Thus, the square-distributed air-water distribution holes can make the top plate 1 more evenly stressed, and then make the top plate of the filter brick less likely to be damaged by the local high pressure generated by the backwashing air flow and water flow.

[0027] Embodiment 2, as a further preferred solution of Embodiment 1, a spare air-water distribution hole 7 is provided at the diagonal intersection of the air-water distribution unit 11, and the spare air-water distribution hole 7 communicates with the cavity below the top plate 1. By providing the spare air-water distribution hole 7, the air-water distribution holes 9 at the four corners and the spare air-water distribution hole 7 at the center can be used as spares for each other to share the air and water flow; under normal circumstances, the spare air-water distribution hole 7 is in a closed state, and it can be selected whether to open it according to the requirement of the opening ratio. If it needs to be opened, only a professional tool is required to punch through the reserved hole. Thus, the opening ratio of the HDPE filter brick can be adjusted according to the actual situation, opened when necessary, improving the efficiency during filtration and also improving the backwashing efficiency.

[0028] Embodiment 3, as a further preferred solution of Embodiment 2, "I"-shaped wing plates 8 are symmetrically arranged on both sides of each spare air-water distribution hole 7, and the wing plates 8 are arranged parallel to the long side of the top plate 1. By providing the "I"-shaped wing plates 8, the water flow can circulate more smoothly between the air-water distribution holes. Thus, when one or several of the air-water distribution holes 9 and the spare air-water distribution holes 7 are blocked, it can play a role in guiding the flow to ensure the normal use of the HDPE filter brick.

[0029] Embodiment 4, as a further preferred solution of Embodiment 1, high-pressure relief safety holes 10 are provided at both ends of each rib plate 12, and the high-pressure relief safety holes 10 communicate with the cavity below the top plate 1. Among them, the aperture of the high-pressure relief safety hole 10 is much smaller than the aperture of the air-water distribution hole 9. In this embodiment, the aperture of the air-water distribution hole 9 is set to 2 - 4 mm, while the aperture of the high-pressure relief safety hole 10 is set to 0.5 - 1 mm. This can ensure that too much air and water do not escape from this hole during normal filtration and backwashing. At the same time, if uneven air-water distribution causes local high pressure around the top plate 1, the high-pressure relief safety hole 10 can be used as a pressure relief hole. And the pressure can be released in time, so that the HDPE filter brick is not easily affected by local high pressure and overturned during backwashing.

[0030] Embodiment 5, as a further preferred solution of Embodiment 1, the two short sides of the two inclined plates 4 and the ends of the water return tank 13 are respectively connected to form two end faces, and a boss 5 and a groove 6 are respectively provided on the two end faces. Adjacent HDPE filter bricks are docked through the cooperation of the boss 5 and the groove 6. In this embodiment, when the two filter brick bodies are docked with each other, sealant can be applied to the docking surface of the boss 5 and the groove 6. Thus, while ensuring the tight connection between the two filter brick bodies, the sealing performance after assembly is also ensured.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An HDPE filter brick for a filter tank system, characterized in that: It includes a filter brick body, and the filter brick body includes a top plate (1), two side plates (2), a bottom plate (3) and two inclined plates (4). A water return groove (13) recessed downward is provided in the middle of the top plate (1). The two long sides of the top plate (1) are respectively connected to the upper sides of the two side plates (2). The lower sides of the two side plates (2) are respectively connected to the two long sides of the bottom plate (3). The upper sides of the two inclined plates (4) are respectively connected to the two bottom corners of the water return groove (13). The lower sides of the two inclined plates (4) are respectively connected to the two long sides of the bottom plate (3). A plurality of rib plates (12) are arranged at equal intervals on the surface of the top plate (1), and the rib plates (12) are arranged parallel to the short side of the top plate (1). The upper surface of the top plate (1) is divided into a plurality of air-water distribution units (11) by the rib plates (12) and the water return groove (13). Air-water distribution holes (9) are provided at the four corner positions of the air-water distribution unit (11), and the air-water distribution holes (9) are communicated with the cavity below the top plate (1).

2. The HDPE filter brick for a filter tank system according to claim 1, characterized in that: A spare air-water distribution hole (7) is provided at the intersection of the diagonals of the air-water distribution unit (11), and the spare air-water distribution hole (7) is communicated with the cavity below the top plate (1).

3. The HDPE filter brick for a filter tank system according to claim 2, characterized in that: "I"-shaped wing plates (8) are symmetrically arranged on both sides of each spare air-water distribution hole (7), and the wing plates (8) are arranged parallel to the long side of the top plate (1).

4. The HDPE filter brick for a filter tank system according to claim 1, characterized in that: High-pressure relief safety holes (10) are provided on the rib plates (12), and the high-pressure relief safety holes (10) are communicated with the cavity below the top plate (1).

5. The HDPE filter brick for a filter tank system according to claim 1, characterized in that: The two short sides of the two inclined plates (4) and the ends of the water return groove (13) are respectively connected to form two end faces. A boss (5) and a groove (6) are respectively provided on the two end faces. Adjacent two HDPE filter bricks are butted with each other through the cooperation of the boss (5) and the groove (6).

6. The HDPE filter brick for a filter tank system according to claim 5, wherein: Sealant is applied between the boss (5) and the groove (6).

Images